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Finding the Fourth Proportional to 387,403.04, 534,558 and 217,604.64

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Solution

The fourth proportional to 387,403.04, 534,558 and 217,604.64 is: 300,261.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,403.04 : 534,558 = 217,604.64 : x
  2. Step 2: Convert to fraction form
    387,403.04/534,558 = 217,604.64/x
  3. Step 3: Cross multiply
    387,403.04x = 534,558 × 217,604.64
  4. Step 4: Simplify right side
    387,403.04x = 116,322,301,149.12
  5. Step 5: Solve for x
    x = 116,322,301,149.12/387,403.04
  6. Step 6: Final answer
    x = 300,261.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.